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Finding the Fourth Proportional to 89,835.40, 134,639.70 and 45,474.40

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Solution

The fourth proportional to 89,835.40, 134,639.70 and 45,474.40 is: 68,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,835.40 : 134,639.70 = 45,474.40 : x
  2. Step 2: Convert to fraction form
    89,835.40/134,639.70 = 45,474.40/x
  3. Step 3: Cross multiply
    89,835.40x = 134,639.70 × 45,474.40
  4. Step 4: Simplify right side
    89,835.40x = 6,122,659,573.68
  5. Step 5: Solve for x
    x = 6,122,659,573.68/89,835.40
  6. Step 6: Final answer
    x = 68,154.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.